Security issues have been identified that could allow an attacker to compromise a system that is running Microsoft Outlook Express or Windows Mail and read data from another Internet Explorer domain or the local computer.

Security issues have been identified that could allow an attacker to compromise a system that is running Microsoft Outlook Express or Windows Mail and read data from another Internet Explorer domain or the local computer. You can help protect your system by installing this update from Microsoft. After you install this item, you may have to restart your computer. This update is provided to you and licensed under the Windows Vista License Terms.

Other critical security updates are available: To find the latest security updates for you, visit Windows Update and click Express Install. To have the latest security updates delivered directly to your computer, visit the Security At Home web site and follow the steps to ensure you’re protected.

This tool checks your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found. Microsoft will release an updated version of this tool on the second Tuesday of each month.

Download and run the Windows 7 Upgrade Advisor to see if your PC is ready for Windows 7. It scans your hardware, devices, and installed programs for known compatibility issues, gives you guidance on how to resolve potential issues found, and recommends what to do before you upgrade.